Mining apparatus



Dec. 23, 1930. M. P. HOLMES MINING APPARATUS Original Filed Sept. 50. 1926 5 Sheetsheet 1 y ,KQ w ..5%\ m.

Dec. 23, 1930. M. P. HOLMES 1,786,244

MINING APPARATUS original Filed sept.' 50, 192e s sheets-sheet 2 Y Dec. 23, 1930. M. p. HOLMES 1,786,244

MINING APPARATUS Original Filed Sept. 3o, 192e s sheets-sheet 3 Patented Dec. 23, 1930 MORRIS P. HOLMES, OF CLAREMONT, CHINERY COMPANY, A

NEW HAMPSHIRE, ASSIGNOR TO STIIDIV'AILQ -MA CORPORATION OF vM'A'SSAOI'IUSElT-m y MINING APPARATUS Application filed September'SO, 1926, Serial No. 138,660. Renewed April 23, 1930;

This invention relates to mining apparatus and more particularly -to'mining machines of the shear or vertical cutter type adapted to operate from the mine trackway.

An object ofthis invention is to provide a mining machine of the wheel Ymounted type wherein the machine is adapted to insert ya -shear or vertical cut in the coal face while guided on the mine trackways. Still another object of this invention is to provide an improved shearing machine having appivoted cutter bar and improved and simplified mechanism for swinging the cutter bar about its pivot. A still furtherobject of this invention is to provide an improvedmining machine having improved mechanism asso'- ciated with the bar swinging mechanism for driving the wheels of the truck. These and other objects ofmy invention will, however, hereinafter more fully appear. Y Y

In the accompanying drawings I `have shown for purposes of illustration one'form which my invention may assume in practice.

In these drawings,-

Fig. 1 is a side elevational view of the improved mining apparatus, the cutter bar being shown in a plurality of positions as indicated by dotted lines. i

Fig. 2 is a plan view of the apparatus shown in Fig. 1.

Fig. 3 is a transverse horizontal sectional view taken on line 3 3 of Fig. l.

Fig. 4l is a developed transverse sectional view taken on line 4-4 of Fig. 1.

Fig. 5 is a detail view, partially in section, illustrating the'operating connections for the truck brake, the View being'taken substan` tially on line 5 5 of Fig.v3.

Fig. 6 is a developed central longitudinally extending horizontal sectional view'- taken substantially on line. 6-6 of Fig. 7 and illustrating the plural speed transmission` gearlng.

Fig. 7 is a detail transverse verticalsec-` f tional View taken substantially on line 7-7 of Fig. 6 and looking in the direction of the arrows. i

In this illustrative embodiment of my invention I have shown a truck frame 1 mounted on wheels2 adapted to move relative to clearly shown in Fig.

' of the machine frame 7 a mine trackway 3 in the usual manner. The truck frame l specifically comprises longitudinally extending parallel angle members 4 held in rigid spaced relation by means of transverse plates 5. The angle memberst carry in a suitable manner the running gear for the truck wheels erally rectangular elongated machine frame or body 7 is supported on and movable relativeto the truck frame 1 in an improved manner to be later described. Further, the machine frame 7 has pivotally mounted thereon an elongated plane cutter bar 8 movable in a vertical plane and about the outer edges of which an endless cutter bit carrying cutter chain 9 is adapted to be circulated, the cutter chain moving in a fixed orbit. The cutter chain 9 is adapted to be driven by means of a usual drivesprocket 10, as 4. The cutter chain drive sprocket 10 is disposed at the front end and is rotatable about aliorizontal axis extending transversely of the machine frame. As shown, the cutter bar V8 is pivoted as at 11 about an axis coincident with the axis of the cutter chain drive sprocket 10 and has secured integral therewith cylindrical bearing members 12 disposed at opposite sides of thev sprocket lO,

the members 12 respectively engaging bearing surfaces 13 and 14. rI he sprocket 10 is adapted to be driven from the driving motor, the .horizontal longitudinally ,extending armature shaft of which is clearly shown in Fig. 6 asat 15, through transmission gearing substantially similar toV that described in my copending application Ser. No. 619,839, filed Feb. 19, 1923. As the specific driving connections between the motor and the cutter chain drive sprocket do not enter per se into this invention, further detailed description of the same is deemed unnecessary other than to state that thesprocket 10 may be eitherconnected or disconnected from the motor at will.

In .specifically describing the improved mechanism for swinging the cutter bar 8 about its pivot 11, it will hereinbe observed that the rear end of thearmature shaft 15 of the driving motor '(see Fig. 6) "has suitably 2. As shown a gen- Cil secured thereto a spur pinion 16 which adapted to drive the truck Wheel driving mechanism and the improved mechaf ism for swinging the cutter bar about its pivot and including plural speed transmission gearing and controlling clutches, substantially similar to those described in the pending application mentioned above, at a slow speed in one direction or at a fast speed in the opposite direction Withoutreversing the motor. ln specifically describing the fast feed transmission mechanisnn it will be noted that pinion 16 meshes with a spur gear 17 suitably lioinnalrd within bearings 18 carried b y the n'iachine frame T. The gear 17 has secured thereto and rotatable therewith a spur pinion 1) which meshes with a larger internal gear 20. The hub 21 of the gear 2t is herein also jour aled on a suitable hearing sleeve 22 on a sleeve clutch member 23 keyecl as at 24 to a longitudinally disposed horizontal main driving or transmissi n shaft journaled at its opposite ends in bearings 26 and 27 suitably carried Within the machine frame. lrloreover, it will be noted that the clutch member 23 carries a` series of friction clutch discs 28 which are interleaved With a corresponding series of clutch discs 29 carried by the sleeve of the internal 20. As shown, the sleeve on this internal gea' is also jrevided with a plurality of adially located longitudinally extending slots SO receiving radial fingers 31 formed on an interlocking member keye l to the hub of the pinion freelf-J rotatable on the sh ft 25. interposed between these lingers 31 are friction clutch operating lingers 34 carried by an axially inovable cylindrical planeclutch operating member 35 disposed coaxial with and encircling the hub ofthe member These fingers 34 extend longitudinally into contact with the adjacent end clutch disc of the clutch 28, ils shown, the rear end of the shaft 25 has secured thereto by a key a spur pinion 3T which meshes with a spur gear 38 journaled within suitable bearings 39 carried by the machine frame. The spur gear 38 has secured thereto and rotatable therewith a` spur pinion 40 which meshes with a larger internal gear 41 keyed at 42 to a longitudinally extending horizontal shaft 43 disposed coaxially with the transmission shaft 25. The shaft 43 is iournaled in spaced alined bearings 44 and 45 suitably carried by the machine frame. 'it will thus be evident that rotation of the .armatare shaft 15 will be transmitted through the pinion 16, gear 17, pinion 19, internal gear 26, friction clutch discs 28, 29, clutch member 23, shaft pinion Si, gear 38, pinion 40,*internal gear 41, to the shaft 4?) to rotate the latter at a predetermined high or fast speed Whenerer the clutch controlling member 35 is operated lo connect the clutch 2S, 29. It Will further be noted that this speed may be lowered at will by slipping the friction discs 28, 29 of the clutch.

llovv referring specifically to the speed transmission, it will be noted that when the clutch operating member 35 in inoperative position and the clutch 26, 2f is released, power Will still be transmitted through the interlocking member and the pinion which is freely rotatable on the shaft 25. This pinion 33 in turn meshes with a gear 46 disposed coaxially With the gear 17 and this gear has secured thereto and rotatable therewith-a pinion 47 which meshes with a spur gear 48 disposed coanially with and rotatable on the shaft 25. This gear 48 has secured thereto and rotatable therewith a spur pinion 4) which meshes with a spur gear 50 arranged coaxially With the gear 46 and this gear has secured thereto and rotatable therewith a spur pinion 51. The spur pinion 51 meshes with an internal gear 52 substantially similar to the internal gear 20. The internal gear 52 also houses a friction clutch substantially similar to the clutch heretofore described in connection with the clutch discs 28, 29 and this clutch includes series of interleaved clutch discs 53, 54, certain of which are carried on the clutch member 55 keyed as at 56 to the shaft 25, While others are carried by a sleeve formed on the internal gear 52. A clutch retaining member 5T is provided keyed as at 58 to Jche hub of the spur pinion 37 and this clutch member in this instance has no interlocking function and is only a. disc retaining member. An axially movable cylindrical plane clutch operating member 59 surrounds the hub of the clutch member 57 and is provided with longitudinally extending fingers 60 which are a flaptcd to engage the adjacent end disc of the clutch 53, 54. The clutch operating members 35 and 59 may be operated to alternately apply their respective clutches by means of suitable shipperl mechanism which is clearly described in the copending application mentioned above and includes an operating handle 61 conveniently located at the rear end o-f the machine (see Figs. 1 and 2). As a result of this slow speed mechanisn'i above described, although the clutch 28R 29 is disconnected, rotation Will when desired he imparted through the pinion 33, gear 46, pinion 47, gear 48, pinion 49, gear 50, pinion 51, internal gear 52, clutch discs 53, 54, clutch member 55, pinion 37. gear 38, pinion 40, internal gear 41, to the shaft 43 so that when the clutch 53, 54 is connected the shaft 43 will be rotated at a slow speed in n opposite or reverse direction from the st feed previously dsecribed. Here it will also be evident that by slipping the friction discs 53, 54, of the slow speed clutch, this speed may be reduced at Will.

As shown in Fig. 3, the shaft 43 is mace Eil hollow and has telescopically arranged therein a shaft 65, the shaft having external threads 66 engaging internal threads 67 formed withinV the hollow shaft 43. The shaft 65 has formed thereon longitudinally extending splineways 68 and cooperating with these splineways are splines 70 carried by a slidable member 71 encircling the screw1 threaded shaft 65 and disposed adjacent the rear end of the hollow shaft 43. As clearly shown in Fig. 3 the member 71 has formed internally thereon gear teeth 72 which are adapted to be connected, by means of a' shipper yoke 73 pivotally mounted on the frame 7, to clutch teeth 74 formed externally on the shaft 43. From the foregoing description, it is evident that when the gear teeth 72,

74 are connected, the shaft 43 andthe screw threaded shaft 65 may ro-tate together. However, when the gear teeth 72, 74 are disconnected and when the shaft 65 is: suitably held against rotation, the shaft 43 may move inwardly or outwardly relative to the shaft 65 due to the screw threaded connection.

. As shown, the rear end of the shaft 65 is journaled on ball bearings 75 suitably carried by a housing or casing 76, the latter being rotatably mounted on a separate base frame rigidly secured as by screws 7.7 to the transverse angle `members 4 of the truck frame 1. VThe shaft 65' has secured theretoV at the vrear end thereof as by a key 78 a bevel gear 79 which constantly meshes with bevel gears 8O and 81 rotatably mounted on l bearing sleeves 82, 83, respectively, surrounding and supported by a horizontal shaft 84 disposed transversely of the truck frame and journaled at its opposite ends in ball bearings 85 suitably carried by the housing 76. The bevel gears 80 land 81 rotate in opposite directions and constitute 'a reversing mechanism for the shaft 84. As clearly shown in Fig. 3 the adjacent inner sides of the gears 80 and 81 are [provided with hub f portions 86. having formed thereon spur suitably rotatably mounted within the housing 76. kThe shaft 92 has secured thereto at its upper end an operating lever 93 (see Figs. 1 and 2). It will thus be evident that when the operator suitably swings the lever 93 about its pivot the shipper yoke 91 is consequently swung and lthe desired gear 87,

88 is connected to the geark 90, At'liereby connecting one or the other off the bevel 'gears 80 and 81 inoperative driving relation'with the shaft-'84. The shaft 84;- `may also be ro-r under the control ofthe clutches 28,29 and 53, 54 described above operated by the operating handle 61. 1

In this instance the shaft 84 has suitably secured thereto 'at one end thereof a drive sprocket 94 which is connected by means of an endless drive chain 95 with a sprocket 96 suitably secured to the rear truck axle 97. The rear truck axle 97 and the front truck axle 98 are connected in driving relation by a suitable chain and sprocket connection 99. Also secured to the shaft 84 adjacent the drive l sprocket 94 as by a key 100 is a brake drum 101 having formed thereon on its external periphery a groove 102 with which a. brake band 103 cooperates. The brake band 103 is secured intermediate its ends as at 104 to the housing 76. rlhe brake band may be contracted or expanded by means of suitable toggle mechanism 105 connected through a link 106 to an operating crank 107 pivoted as at 108 on one of the angle members 4 of the truck frame. The lever 107 may be held in its different adjusted vpositions by means of a suitable spring pressed plunger 109 carried by the lever and cooperating with locking apertures 110 formed in the adjacent angle member 4. This braking device is adapted to control rotation of the truck wheels while the mining apparatus is moving over an inclined trackway and to control rotation of the shaft 84 during operation of the machine during cutting as hereinafter described.

As clearly shown in Figs. l and 4, the cutter bar8 has securedthereto at opposite sides Q:-

thereof as by rivets 111, angle members 112 and 113 respectively connected as by bolts 114 to parallel supporting arms 115 and 116, the latter being pivotally mounted on bearing sleeves 117 surrounding and supported by the front truck axle 98. These arms .115 and 116 support the forward end of the machine description it will be evident that when th,

shaft 65 is connected by means of the clutch "1 member 73 to the shaft 43 and when one or the other of the gears 87, 88 is connected to the shaft 84, the truck wheels may be driven in opposite directionsand at different speeds. It will further be evidentthat when the,l ears 74, 72 are disconnected and when the' 'rake` band 103 is applied 'preventin rotation of the screw threaded sha-ft 65, -it .eing under-V stood that one .or the other'oftt'he bevel gears 80 and 821 are connected 4to the shaft84, the

shaft 43 and consequently the machine frame v7 may be moved'longitudinally relative to the shaft 65 in either direction and at diderent speeds. Upon movement of the machine frame 7 the arms 115,116swing about the ii'ont truck axle 9o as a pivot and consequently .airing the cutter hai' about its pivotal axis. During this swinging' movement the shaft 65 is aeapted to siving; or rock slightly about the axis of the shait Si and to permit this swinging movement the housing 76 is made sepa 'ate from its base and is pivotally mounted Within liiiai'ing sleeves 121 at its opposite sides. rear end of the machine trame '7 is supported by this housing 76.

ln the operation ot my improved mining apparatusE itivill be noted that when the latter is moving rapidly about the mine the clutch member 7l is moved to connect the 'vii lili) "gear teeth and 7st and the gear Si) is connected to the shai't Self by means of the cliitf'h member Si), it be e' understood 'that the ni motor running: and the tast speed clii'il 2S, 2i) is applied, and consequently the sh eli-3 and the shatt are rotating; speed. lllhen it is desired to drive the ini apiriaratus i' .ai'ivai'dly relative to the trac ivay at a high speed. the hevel ,o'ear @O i qiiently prev nting' rotation or the shaft i#v Upon conti iiiied rotation ot' the screw threaded shalt 4:3 at a nge geen the saine moves o the screiv (35 ie moves rearick rame, the arms the fr nt truck aille 98 and consequently swinging the cntter bai' 8 upwardly about its pivot ll :it a high speed trom tl e tiill line position to the upper dotted line position shown in Fig. l. The operator then 'suitably connects the cii ier chain drive sH-'oilie"y l0 to tl and the ciitter ein'. about the out ed the usual manner. cli-- 2S) is then released. The operator then roniiects the gears 72, I5 the cliiich memher -S) is shifted connecti C nevel `sg'ear 8l to the shatt Si, the hrale 1702. 'iO i'eleasiwh and reariv: yrdly e motor 1 speelr upon appication oi" ther .slow speed cliitch 51" Vfer hai' is anni Y y speed, the bodily along' the litter the siiaipinjg' f einnleted t i=. .1, Til. 'T2 are (hs ad the brake l l0?) is again app l, 'onting rotntifn et the sh( it (35 and the triiel Wheels ant cone-rqiiently the cut-tei' hir is swung about pivot to the l( aver dotted li n connect 7 4 1' 1 1 w Y 1 ed. the hraae lOl-3 is reiea, en, -c tno bnc?.

' a rear 80 connected to the and com sequently the cutter bar is reti att face at a cutting speed, the mining apparatus moving bodily rearwardly along the trackieega/ili way at this time.

tive to the triiclr iframe and swinging the bar upwardly about its pivot to the iiill line 'l oeiel are tion shown in Fig. i. 'Lillie gears then connected, the gear 81 t to the si Lft 84 and the minii moved i'zii idly rearwardly Way and from the face. l operations and aeiantages ofi i' mining apparatus will be (flea 'ly to those skilled in this Air ave iii this application :ip-effin' ly describec one form which iny inventl may assinne in practice, it Willbc iinde that this torni ot the saine has heen si i'or purposes oi illustration and tl' 'eiition inay be niodilied and inbon various oth' torina Without departing);

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il. ln a ininin -eeled tiiicl: ne, ciiit'er L supported tnireon and in filzitve thereto, lier? niechani' i f tiling a pi oted cnitei in; mounted on said traine and having a relatively lined pfvotal connection with said lr trame, and mechanism toi' moving said ond iframe relative 11) said truck frame io t eiilect swinging' movement ot' said cutter bai' alzoiit its pivot relatively thereto.

Q. ln a miningv apparatus, a wheeled truck traine, a 'trame supported thereon and niovahle longitudinally relative thereto, kei'i' ciitiiigr mechanism ii'mliidinn' a pivoted cnil'- ter Jar inoiinted on said second frame and having a relatively lined pivotal conneetiini with said triicli; frame, and mechanism im' moving' said second frame longitudinally rei Y Sill@ ative t triiek iframe to eiiect swinging' movement oi said ciittei' bar ahoiit its; piro'. relatively thereto.

ZE. in a mining apparatus, a wheeled truck frame, a trame siipportct'i thereon and movahle relagive hereto, hert tiit inginechaiiism includinge pivoted cutter har mounted on said second traine and hr a relatively tiled pivotal connection iv' l@aid truck traine, a, driving; motor carried iy said second fr: me, and meehanism driven )y said motor for moving; said second traine relative to said truel: frame to e'i'ect sii/'inging movement ot Lafid cutter bar about its pivot relatively thereto.

e'. In mining apparatus, a Wheel truck trame, a trame supported thereon and movable longitiidinally relative thereto, ker't cutting mechanism including a pivoted cutter har mounted on said second frame and having a relatively fixed pivotal connection time# with said truck vframe, a driving motor cardriven by said motor for moving said second frame longitudinally relative to said truck frame toelifect swinging movement of said,

cutter bar about its pivot relatively thereto.

5. In a mining apparatus, a wheel truck frame, a frame mounted thereon and movable relative thereto, kerf cutting mechanism including a pivoted cutter bar mounted on said second frame and carrying an orbitally movable cutter chain and pivotally connected to said truck frame about an axis lying wholly outside of the orbit of said chain, a plural speed transmission mechanism on said second frame, and mechanism driven through said plural speed transmission mechanism and operatively connected to said cutter bar for moving said second frame relative to said truck frame to eHect swinging movement oi said cutter bar at different speeds about its pivot relatively thereto.

6. In a mining apparatus, a whe-eltruck frame, a frame mounted thereon and movable longitudinally relative thereto, lerf cutting mechanism including a pivoted cutter bar v to mounted on said second frame and carrying an orbitally movable cutter chain and pivotally connected to said truck frame about an axis lying wholly outside of the orbit of said chain, a plural speed transmission mechanism on said second frame, and mechanism driven through said plural speed transmission mechanism and operatively connected to said cutter bar for moving said second frame longitudinally relative to said truck frame to effect swinging movement of said cutter bar at different speeds about its pivot relatively thereto. l

7. In a mining apparatus, a wheeled truck frame, a frame pivotally mounted thereon, kerf cutting mechanism including a cutter bar mounted on said second frame and swingable relative thereto, and mechanism for moving said second frame about its pivotal mounting on said truck 'frame to e'ect swinging movement of said cutter bar aboutits pivot relatively thereto.

8. In a mining apparatus, a wheeled truck frame, a frame mounted thereon and movable relative thereto, kei-t cutting mechanism including pivoted cutter bar mounted on said second frame and carrying an orbitally movable cutter chain and pivotally connected to said truck fra-me about an axis lying wholly outside of the orbit of said chain, a plural speed transmission mechanism on said second frame, and mechanism driven through said plural speed transmission mechanism and operatively connected to said cutter bar for moving said second frame relative to said truck frame to eect swinging of said cutter bar about its pivot in opposite directions and at different speeds relatively thereto.

9. In a mining apparatus, a wheeled truck frame having front and rear wheel axles, a frame mounted on said truck frame movable relative thereto, kerf cutting mechanism including a pivoted cutter bar mounted on said second frame, and mechanism for moving said second frame relative to said truck frame to edect swinging movement of said cutter bar ,about its pivot relatively thereto and including pivotal connections between said cutter bar and the front truck axle.

l0. In a mining apparatus, a wheeled truck frame having Jfront and rear wheel axles, a frame mounted on said truck frame and movable relative thereto, kerf cutting mechanism including a pivoted cutter bar mounted on said second frame, and mechanism for moving said second frame relative to said truck frame to effect swinging of said cutter bar about its pivot relatively thereto and including pivotal connections between said cutter bar and one of said truc-k axles.

1l. In a mining apparatus, a wheeled truck `frame, a frame mounted thereon and movable relative thereto, kerf cutting mechanism including a pivoted cutter bar mounted on said second frame and carrying an orbitally movable cutter chain, and mechanism for moving said second frame relative to said truck frame to eli'ect swinging move-` ment of said cutter bar about its pivot relatively thereto and including a pivotal connection lying wholly outside of the orbit of said cutter chain and between said cutterV bar and said truck frame.

l2. vIn a mining apparatus, a wheeled truck frame, a fram-e mounted thereon and movable relative thereto, kerf cutting mechanism including a pivoted cutter bar mount-- ed on said second frame, and mechanism for moving said second frame relative .to said truck frame to eifect swinging movement of said cutter bar about its pivot relatively thereto and including telescopically arranged threadedly connected shafts, and means for. eecting rotation of said shafts relativ-e to each other to effect movement of said second frame relative to said truck frame. Y

13. -In a mining apparatus, a truck frame having wheel axles, a frame supported on said truck frame and' pivotally connected to one of said axles, kerf cutting mechanism including a pivoted cutter bar mounted on said second frame and mechanism for swinging said second frame about' said front truck axle andrelative to said truck frame to eii'ect swinging of said cutter bar about its pivot relatively thereto.

. 14.'In a mining apparatus, a. wheeled truck frame, a frame supported thereon and movable relative thereto, kerf cuttingl mechanismV including a pivoted cutter bar mounted on said second frame and having a relalil ill)

tively fixed pivotal connection with said truck frame, a driving motor on said second trame, and mechanism driven by said motor for moving said second i'rame longitudinally in either direction realtive to said truck trame to effect swinging movement ot' said cutter bar about its pivot in opposite directions relatively thereto.

lo. ln a mining apparatus, a truck frame having wheel axles, a 'frame supported on said truck trame, sulniorting means tor the forward end ot said second trame comprising parallel arms pivotally connected to the front truck axle, hert cutting mechanism including a pivoted cutter bar mounted on said second traine and to which said parallel arms are secured, and means for swinging said cutter bar about its pivot relative to said second 'trame including mechanism for swinging said supporting arms about the front truck aXle.

16. ln a mining apparatus, a truck trame having wheel axles, a trame supported on said truck frame, supporting means for the iorward end of said second trame comprising parallel arms pivotally connected to one of said truck axles, hert cutting mechanism including a pivoted cut-ter bar mounted on said second trame and to which said parallel arms are secured, and means for swinging said cutter bar about its pivot relative to said second frame including mechanism for swinging said supporting arms about one of said truck axles.

17. In a mining apparatus, a wheeled truck trame, a frame supported thereon and movable relative thereto, tert cutting mechanism including a pivoted cutter bar mounted on said second traine, and mechanism for moving said second frame relative to said truck trame to effect swinging movement of said cutter bar about its pivot relatively thereto and including telescopically arranged relatively rotatable elements, and means for etiecting relative rotation between said elemeans to eii'ect movement of said second iframe relative to said truck trame.

18. ln a mining apparatus, a wheeled truck trame, a trame supported thereon and movable relative thereto, kerr" cutting mechanism including a pivoted cutter bar mounted on said second frame, and mechanism tor ineving said second trame relative to said truck frame to effect swinging of said cutter bar about its pivot relatively thereto including telescopically arranged relatively rotatable elements, means for eliecting relative rotation between said elements to effect movement ot said second trame relative to said iront frame, and means for effecting relative rotation between said elements in opposite directions.

19. In a mining apparatus, a wheeled truck trame, a Jrame supported thereon and movable relative thereto, kerf cutting mechanism including a pivotcd cutter bar mounted on said second frame, and mechanism for moving said second trame relative to said truck trame to eliect swinging of said cutter bar about its pivot relatively thereto including telescopically arranged relatively rotatable elements, means for effecting relative rotation between said elements to effect movement ot' said second trame relative to said front Yframe, and means for effecting relative rotation between said elements in opposite directions at different speeds.

Q0. ln a mining apparatus, a wheeled truck trame, a 'traine supported thereon, pivota, connections between the opposite ends ot said second trame and said truck trame, kort cutting iechanism including a pivoted cutter bar mounted on said second trame, and mechanism ior moving said second frame about its pivotal connections and relative to said truclt iframe to ell'ect swinging ot said cutter bar about its pivot relatively thereto.

21. In a mining apparatus, a wheeled truck trame. a trame supported thereon and movable relative thereto, lrerf cuttin g mechanism including a pivoted cutter bar mounted on said second trame, and mechanism tor moving said machine trame in opposite directions relative to said truck trame to effect swinging ot said cutter bar about its pivot in opposite directions relatively thereto and including a reversing mechanism carried by said second frame.

22.. ln a mining apparatus, a wheeled truck trame, a frame supported thereon and movable relative thereto, kerl cutting mechanism including a pivoted cutter bar mounted on said second frame, and mechanism ,tor moving said second trame relative to said truck trame to e'dect swinging of said cutter ar about its pivot relatively thereto and ineluding relatively rotatable elements and releasable trictional means for holding one ot said elements against rotation.

Q3, In amining apparatus, a wheeled truck trame, a Vtrame .supported thereon and movable relative thereto, lrerf cutting mechanism including a pivoted cutter bar mounted on said second frame, and mechanism for moving said second trame relative to said trucl frame to etliect swinging ot said cutter bar about its pivot relatively thereto and including relatively rotatable elements and releosA able frictional means ter holding one ot said elements against rotation, and means for connecting said elements for simultaneous rotation.

24. ln a mining apparatus, a Wheeled trucl: Aframe, a jframe supported thereon and movable relative thereto, kerf cutting mechanism including a pivoted cutter bar mounted on said second trame, a driving motor on said second frame, mechanism driven by said motor for moving said second trame relative to said truck frame to effect swinging of said tresses cutter barabout its pivot relatively thereto, and means driven bysaid motor for driving the wheels ot said truck.

25. In a mining apparatus, a wheeled truck frame, a frame supported thereon and movable relative thereto, kerf cutting mechanism including a 'pivoted cutter bar mounted on said second frame, a driving motor on said second frame, mechanism driven by said motor for moving said second frame relative to said truck trame to etiiect swinging of said cutter bai; about its pivot relatively thereto, and means driven by said .motor for driving the wheels of said truck in opposite directions.

26. In a mining apparatus, a wheeled truck frame, a trame supported thereon and movable relative thereto, korf cutting mechanism including a pivoted cutter bar mounted on said second frame, a driving motor on said second frame, mechanism driven by said motor for moving said second frame relative to said truck frame to effect swinging oit said cutter bar about its pivot relatively thereto, andmeans driven by said motorfor driving the wheels of'said truck in opposite directions and at different speeds.

27. In a ininiiig'apparatiis, a wheeled truck traine, a machine 'fra-me supported thereon` and movable relative thereto, said machine trame having mounted thereon a pivoted cutter bar havinga relatively lixed pivotal connection with said truck trame, means for swinging said cutter bar about its pivot including mechanism for moving said machine frame relative to said truckv frame to elfect swinging movement of said cutter bar, and mechanism operatively connected to said machine frame moving mechanism for driving the truck wheels.

28. In a mining apparatus, a wheeled truck frame, a machine frame supported thereon and movable longitudinally relative thereto,

said machine frame having mounted thereon a pivoted cutter bar having a relatively iiXed pivotal connection with said truck frame, means for swinging said cutter bar about its pivot including mechanism tor moving said machine frame longitudinally relative to said truck frame to elfect swinging movement of said cutter bar, and mechanism operatively connected to said machine trame moving mechanism for driving the truck wheels.

29. In a mining' apparatus, a wheeled truck i frame, a machi ne frame supported thereon andv movable relative thereto, said machine frame having mounted thereon a pivoted cutter bar having a relatively fixed pivotal connection with said truck frame and a driving motor in said trame, means driven by said motor for swinging said cutter bar about its Vpivot including mechanism for moving said machine frame relative to said truck frame to effect bar swing, and mechanism drivenfby said motor for driving the truck wheels.

Y cluding a pivoted 3l. In a minin apparatus, a wheeled truck frame, a machine frame snpnorted thereon and movable relative thereto, said machine frame having cutting mechanism thereoi-i` incutter bar swingable in a carrying an orbitally movand means for. moving said verticalV plane and able cutter chain.,

v machine frame relative tosaid truck frame, to

effect swinging movement of said bar about its pivot including a pivotal connection between said bar and truck frame and lying wholly outside of the orbit oit' said cutter chain. Y'

32. VIn a mining apparatus, a wheeled truck vframe, a machine traine supported thereon and movable relative thereto, said machine frame having cutting mechanism thereon including a pivoted cutter bar swingable in a vvert-ical plane and carrying an orbitally movable cutter chain, and means for moving said machine frame longitudinally relative to said truck frame to effect swinging movement of said bar aboutrits pivot including a pivotal connection between said bar and truck frame and lying wholly outside of the orbit of said cutter chain. n

d3.l In a mining apparatus, a. wheeled truck frame, a machine frame supported thereon and movable relative thereto, said machine frame having cutting mechanism thereon including a pivoted cutter bar carrying an orbitally movable cutter chain and a driving motor in said frame, and means driven by said motor for moving said machine frame `relative to said truck frame to effect swinging movement of said bar about its pivot including a'pivotal connection between said bar and said truck trame and lying wholly outside et the orbit of said cutter' chain.

34. In a mining apparatus, wheeled truck traine, a machine frame supported thereon and movable relative thereto, said'machine traine having cutting mechanism thereon including a pivoted cutter bar carrying an orbitally movable cutter chain and a driving motor in said frame, and means driven by said motor for moving said machine frame longitudinally relative to. said truck frame to effect swinging movement of said bar about its pivot including a. pivotal connection between said bar and said truck frame and lying 'holly outside ot the orbit ot said cutter In a mining:

cutting inetlrinism thereon includ- Y a swingable elongated plane cutter bar,

a pivotal connection between the inner end ot said har and said base frame, said bar being pivotally mount-ed on said base trame, and means iivotally connected to said bar at a point between its outer end and said pivotal connection tor swinging said bar relative to said hase frame to etect a swinging cut.

. 3G. in a mining apparatus, a portable base trame, cutting mechanism thereon including a swingable cutter bar carrying an orbitally movable cutterchain, a pivotal connection between said bar and said base trame, and means pivotaily connected to said bar about an axis lying within the orbit ot said cutter chain between the outer end of said bar and said pivotal connection for swinging said bar relative to said base Ytrame to effect a swinging cut.

37. ln a mining apparatus, a portable base trame, cutting mechanism thereon including` a swingable cutter bar carrying an orbitally movable cutter chain, said cutter bar being pivotally mounted on said base trame about an axis lying wholly outside ot the orbit or" said chain, and means pivotally connected to said bar about an axis lying within the orbit of said chain tor swinging said bar about its pivot relative to said base frame to effect a swinging cut.

38. ln a mining apparatus, a portable base Aframe, cutting mechanism thereon including a swingable cutter bar carrying an orbitally lpparatus, a portable hase movable cutter chain and having a rigidly connected projecting supporting arm extending outside oi the chain orbit, a pivotal connection between the inner end ot said supporting arm and said base frame on a horizontal axis lying outside the chain orbit, and

means carried by said base trame and operatively connected to said cutter bar to swing the latter about its pivot relative to said base i rame to etl'ect a swinging cut.

39. In a mining apparatus, a portable base trame, cutting mechanism mounted thereon including a swingable cutter bar carrying an orbitally movable cutter chain and pivotally mounted on said base trame about a horizontal axis lying wholly outside of the orbit ot said cutter chain, and means carried by said base trame and operatively connected to said cutter bar to swing said bar about its pivot relative to said base trame to effect a swinging cut.

40. In a mining apparatus, a portable base t i ,I a trame mounted thereon and movable relative thereto, cutting mechanism including a swingable cutter bar pivotally connected to said trames at relatively i'ixed spaced points respectively, and mechanism for moving said second mentioned frameP relative to said base frame to swing said cutter bar relative to said trames to effect a swinging cut.

41. In a miiiing apparatus, a portable base trame, cutting mechanism thereon including a pivoted cutter bar and tor said bar whose pivotal axis is parallel to but oi'set trom the bar pivot axis, a pivotal connection between said bar mounting and said base traine on a third axis, and mechanism for effecting swinging movement et said bar mounting relative to said base trame to swing said bar relative to said 'frame to etiect a swinging cut.

42. ln a minin apparatus, a portable base trame. cutting mechanism thereon including a pivoted cutter bar and a pivotal mounting for said bar, said cutter bar being pivotally connected to said mounting and to said base trame, and mechanism for effecting movement of said bar mounting relative to said base 'frame to swing said bar relative to said base 'trame and said mounting to effect a swinging cut.

e3. In a mining apparatus, a portable base trame, cutting mechanism thereon including a pi voted cutter bar and a pivotal mounting for said bar, a member secured to and supporting said bar and pivotally connected to said base frame, and means for swinging said bar mounting relative to said base frame to swing said bar relative to said base trame and said mounting to effect a swinging cut.

Lill. ln a mining apparatus, a portable base trame, cutting mechanism thereon including a pivoted cutter bar, a pivotal mounting for said bar, an arm extending radially from the pivotal axis ot said bar on said mounting and secured at its outer end to said bar, a pivotal connection between the inner end ot said arm and said base trame, and means tor moving said bar mounting for swinging said arm relative to said base 'frame to swing said cutter bar relative to said base trame and said mounting to effect a swinging cut.

-il ln a mining apparatus, a portable base 4ranun a i'ranic supported thereon and movaile relatire thereto, hert' cutting mechanism including a piroted cutter bar mounted on second iranie and having a relatively ixed pivotal connection with said base trame, a d mechanism tor moving z .id second iframe :elativc to said base trame to eicft :ovini/ing movement oi said cutter har about iw: pivot "eiatively the! Y apparatus, a, portable baise 'freine mou Yted thereon and niovable cutting mechanism inen sa id carrying' rnain, and inccaauism tor l sec'nid iframe relative to said i to eii'ect swinging movement ol cin er bar about its pivot relatively thereto and including a pivotal connection lying wholly outside the orbit ot said cutter a pivotal mounting chain and between said cutter bar and said base frame.

et?. In a mining apparatus, at Wheeled truck adapted to run along a. mine traclvvay, a frame mounted on said truck for movement longitudinally relative thereto, lerf cutting mechanism carried by said frame and including a pivoted kerl cutter, a pivotal mounting `for said kerf cutter connected between said frame and truck, a motor carried by said frame for driving said kerl cutting mechanism, devices driven by said motor for moving said frame longitudinally relative to said truck to effect swinging movement of said keriE cutter about its pivot relatively thereto,

and devices. driven by said motor for driving the truck Wheels irrespective of the position of said second frame relat-ive to said truck.

48. In a mining appara-tus, a Wheeled truck adapted to run along a. mine trackvvay, a frame mounted on said truck for movement longitudinally relative thereto, kerf cutting mechanism carried by said frame and including a pivoted kerf cutter swing-able in a vertial pla-ne to cut a vertical kort', a pivotal mounting for said ker'tA cutter connected between said Vtrame and truck, a motor carrie-d by said irame for driving said kerl' cutting meclmnisni. devices driven by said motor for moving said frame longitudinally relative to said truck to effect swinging movement of said kerf cutter about its thereto, and devices driven by said motor for driving the truck wheels irrespective of the position of said second frame relative to said truck.

a9. In a mining apparatus, a Wheeled truck trame, a machine body supported thereon and movable longitudinally relative thereto, said machine body having mounted thereon a pivoted cutter bar carrying an orbitally movable cutter chain, and means for swinging said cutter bar about its pivot including mechanism for moving said machine body longitudinally relative to said truck frame, and connect-ions between said cutter bar and said truck frame and lying Wholly outside of said cutter chain orbit.

50. In a mining apparatus, a Wheeled truck trame, a machine body supported thereon and movable longitudinally relative thereto, said machine body having mounted thereon a pivoted cutter bar carrying an orbitally mova ble cutter chain and a driving motor in said body, and means driven by said motor for swinging said cutter bar about its pivot including mechanism 'for moving said machine body longitudinally relative to said truck Jframe, and connections between said cutter bar and said truck frame and lying Wholly outside the orbit of said cutter chain.

51. In a mining apparatus, a Wheeled truck frame, a machine body mounted thereon and mcvable longitudinally relativefthereto, said pivotrelatively v machine body having mounted thereon a pivoted cutter bar carrying an orbitally movable cutter chain, and means Jfor swinging said cutter bar about its pivot to Vposit-ions wher-ein the cutting portion thereof lies at opposite sides oi a longitudinal plane including the cutter bar pivot and including connections between said cutter bar and said truck frame and lying Wholly outside of said cutter chain orbit.

In a mining apparatus, a Wheeled truck iframe, a machine body supported thereon and movable longitudinally relative thereto, said machine body having mounted thereon a plv* MORRIS P. HOLMES. 

